Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6_Very_StrongBP7
The NM_000251.3(MSH2):c.2802G>A(p.Thr934=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000944 in 1,610,700 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T934T) has been classified as Likely benign.
MSH2 (HGNC:7325): (mutS homolog 2) This locus is frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). When cloned, it was discovered to be a human homolog of the E. coli mismatch repair gene mutS, consistent with the characteristic alterations in microsatellite sequences (RER+ phenotype) found in HNPCC. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]
BP4 - Multiple lines of computational evidence suggest no impact on gene or gene product (conservation, evolutionary, splicing impact, etc.)
Computational evidence support a benign effect (BayesDel_noAF=-0.87).
BP6
?
BP6 - Reputable source recently reports variant as benign, but the evidence is not available to the laboratory to perform an independent evaluation
Variant 2-47482946-G-A is Benign according to our data. Variant chr2-47482946-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 91051.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
?
BP7 - A synonymous (silent) variant for which splicing prediction algorithms predict no impact to the splice consensus sequence nor the creation of a new splice site AND the nucleotide is not highly conserved
Synonymous conserved (PhyloP=-1.77 with no splicing effect.
Likely benign, criteria provided, single submitter
clinical testing
CeGaT Center for Human Genetics Tuebingen
Dec 01, 2020
- -
Likely benign, criteria provided, single submitter
clinical testing
Quest Diagnostics Nichols Institute San Juan Capistrano
Apr 24, 2023
- -
Likely benign, no assertion criteria provided
clinical testing
Department of Pathology and Laboratory Medicine, Sinai Health System
-
The MSH2 p.Thr934= variant was not identified in the literature. The variant was identified in dbSNP (ID: rs150259097) as "With Uncertain significance allele", ClinVar (classified as benign by Invitae; as likely benign by Ambry Genetics, Counsyl and two other submitters; as uncertain significance by two submitters), UMD-LSDB (1x as unclassified variant ). The variant was identified in control databases in 25 of 273988 chromosomes at a frequency of 0.00009 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 4 of 23584 chromosomes (freq: 0.0002), Latino in 3 of 34170 chromosomes (freq: 0.00009), European in 10 of 125066 chromosomes (freq: 0.00008), Finnish in 7 of 25714 chromosomes (freq: 0.0003), and South Asian in 1 of 30256 chromosomes (freq: 0.00003), while the variant was not observed in the Other, Ashkenazi Jewish, and East Asian, populations. The p.Thr934= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -
Likely benign, no assertion criteria provided
clinical testing
Mayo Clinic Laboratories, Mayo Clinic
Oct 17, 2017
- -
Lynch syndrome 1 Benign:3
Likely benign, criteria provided, single submitter
clinical testing
Counsyl
Dec 12, 2015
- -
Likely benign, criteria provided, single submitter
clinical testing
Mendelics
May 28, 2019
- -
Benign, criteria provided, single submitter
clinical testing
Myriad Genetics, Inc.
Mar 22, 2023
This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing. -
Hereditary cancer-predisposing syndrome Benign:3
Likely benign, criteria provided, single submitter
curation
Sema4, Sema4
Sep 25, 2021
- -
Likely benign, criteria provided, single submitter
clinical testing
Color Diagnostics, LLC DBA Color Health
Feb 17, 2016
- -
Likely benign, criteria provided, single submitter
clinical testing
Ambry Genetics
Aug 13, 2014
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
not specified Benign:1
Likely benign, criteria provided, single submitter
clinical testing
Women's Health and Genetics/Laboratory Corporation of America, LabCorp
Aug 29, 2019
- -
MSH2-related disorder Benign:1
Likely benign, criteria provided, single submitter
clinical testing
PreventionGenetics, part of Exact Sciences
Jun 17, 2019
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Lynch syndrome Benign:1
Likely benign, criteria provided, single submitter
clinical testing
All of Us Research Program, National Institutes of Health